Nearly every headless UI test opened with the same four-line prologue
(resolve the shared MainWindow, show it, cast its DataContext, wait for the
assembly list), then repeated the corelib lookup, the EnsureLazyChildren +
Children.OfType<T>().Single() drill, the registry single-by-header lookups,
and the open-an-assembly-and-wait dance. The duplication made the intent of
each test hard to see and every signature tweak a suite-wide edit.
Collapse those into TestHarness (BootAsync, OpenAssemblyAsync, GetCommand,
GetEntry) and TreeNavigation extensions (FindCoreLib, GetChild<T>, Expand<T>),
then apply them across the suite. Net ~865 lines of boilerplate removed with
no change in behaviour; the full headless suite stays green.
Ctrl+E / Ctrl+Shift+F previously activated the pane but left
keyboard focus wherever it was — the user still had to click the
TextBox before typing. Add a FocusRequested event on SearchPaneModel
that the view subscribes to and pushes Focus() on the SearchInput
TextBox through Dispatcher.UIThread.Post (a tick lets the freshly-
active pane surface in the layout so .Focus() actually takes).
Assisted-by: Claude:claude-opus-4-7:Claude Code
SearchPaneModel gains an Activate(SearchResult) method that resolves
result.Reference through AssemblyTreeModel.FindTreeNode and moves the
assembly-tree selection there — exactly the WPF NavigateToReferenceEventArgs
flow, minus the message-bus indirection. SearchPane.axaml.cs wires
DoubleTapped + Enter on the results ListBox to call Activate.
Assisted-by: Claude:claude-opus-4-7:Claude Code
Siegfried Pammer